MXSMBG20A Equivalent & Substitute Parts

Part Overview

The MXSMBG20A is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Microchip Technology. This surface mount component is designed for general-purpose transient voltage suppression applications, featuring a 20V reverse standoff voltage and 32.4V maximum clamping voltage. The device is qualified to MIL-PRF-19500 military standards and operates across a temperature range of -65°C to 150°C. The MXSMBG20A is currently in active production status with 952 units in stock. Equivalent substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when specific packaging or compliance requirements necessitate component substitution.

Substiute Parts

MXSMBG20A

Microchip TechnologyIn Stock: 966MXSMBG20A Datasheet

Current PartRFQ

SMBG20A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 3849SMBG20A-E3/52 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MXSMBG20A are qualified based on electrical and mechanical parameter equivalence within the TVS diode category. The substitution logic is determined by the following critical parameters:

Electrical Parameters:

• Voltage - Reverse Standoff (Typ): 20V
• Voltage - Breakdown (Min): 22.2V
• Voltage - Clamping (Max) @ Ipp: 32.4V
• Current - Peak Pulse (10/1000µs): 18.5A
• Power - Peak Pulse: 600W

Mechanical Parameters:

• Package / Case: DO-215AA, SMB Gull Wing
• Mounting Type: Surface Mount
• Unidirectional Channels: 1
• Type: Zener

Substitute parts must match all electrical parameters exactly and maintain identical mechanical packaging specifications. The SMBG20A-E3/52 from Vishay General Semiconductor - Diodes Division satisfies these requirements and is therefore classified as a direct equivalent substitute.

Parameter Comparison

*Operating temperature range differs at the lower limit. The SMBG20A-E3/52 operates from -55°C to 150°C, while the MXSMBG20A operates from -65°C to 150°C. This difference is significant only for applications requiring operation below -55°C.

Engineering Selection Recommendations

MXSMBG20A (Microchip Technology):

• Primary selection for applications requiring military-grade qualification (MIL-PRF-19500)
• Required for designs with operating temperature specifications below -55°C
• Appropriate for applications where military compliance documentation is mandatory
• RoHS non-compliant status; suitable for legacy or non-regulated applications

SMBG20A-E3/52 (Vishay General Semiconductor - Diodes Division):

• Direct electrical and mechanical equivalent for standard commercial applications
• RoHS3 compliant; required for designs subject to RoHS regulations
• Suitable for applications with operating temperature range of -55°C to 150°C
• Higher inventory availability (3822 units) supports rapid procurement
• Tape & Reel packaging format supports automated assembly processes

Both parts are active products with confirmed availability. Selection between these equivalents is determined by compliance requirements, operating temperature specifications, and packaging format needs.

Frequently Asked Questions (FAQ)

Q: Can the SMBG20A-E3/52 replace the MXSMBG20A in all applications?

A: The SMBG20A-E3/52 is electrically and mechanically equivalent for applications operating within the temperature range of -55°C to 150°C. Applications requiring operation below -55°C must use the MXSMBG20A. Applications subject to RoHS regulations must use the SMBG20A-E3/52.

Q: What is the significance of the different operating temperature ranges?

A: The MXSMBG20A operates from -65°C to 150°C, while the SMBG20A-E3/52 operates from -55°C to 150°C. The 10°C difference at the lower limit affects component selection only for applications with minimum operating temperatures below -55°C.

Q: Are there packaging differences between these parts?

A: Both parts use identical DO-215AA (SMB Gull Wing) surface mount packaging. The MXSMBG20A is supplied in standard packaging, while the SMBG20A-E3/52 is supplied in Tape & Reel format. Tape & Reel packaging is optimized for automated assembly processes.

Q: What compliance certifications differ between these parts?

A: The MXSMBG20A is qualified to MIL-PRF-19500 military standards and is RoHS non-compliant. The SMBG20A-E3/52 is RoHS3 compliant. Both parts are REACH Unaffected and classified as EAR99 for export control purposes.

Q: Are the electrical characteristics identical between these substitutes?

A: Yes. Both parts share identical electrical specifications: 20V reverse standoff voltage, 22.2V minimum breakdown voltage, 32.4V maximum clamping voltage, 18.5A peak pulse current, and 600W peak pulse power rating.

Q: Which part should be selected for new designs?

A: For new designs subject to RoHS regulations, select the SMBG20A-E3/52. For military applications or designs requiring operation below -55°C, select the MXSMBG20A. For general-purpose applications without specific compliance mandates, either part is suitable based on availability and packaging requirements.